(19)

(11)

EP 1 249 139 A2

(12)

(88) Date of publication A3: 30.05.2002 (43) Date of publication: 16.10.2002 Bulletin 2002/42 (21) Application number: 01948886.5 (22) Date of filing: 10.07.2001

(51) International Patent Classification (IPC)7: H04Q 7/00 (86) International application number: PCT/US0121/622 (87) International publication number: WO 0200/5576 (17.01.2002 Gazette 2002/03)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR (30) Priority: 10.07.2000 US 612802 (71) Applicant: AT & T Corp. New York, NY 10013-2412 (US)

(72) Inventors: CHOW, Albert, T. Hillside, NJ 07642 (US) ERVING, Richard, Henry Piscataway, NJ 08854 (US) MILLER, Richard, Raymond, II Morris, NJ 07960 (US) RICE, Christopher, W. Parsippany, NJ 07054 (US) RUSSELL, Jesse, Eugene Piscataway, NJ 08854 (US) YING, Wenchu Cedar Knolls, NJ 07927 (US) (74) Representative: Suckling, Andrew Michael  Marks & Clerk4220 Nash CourtOxford Business Park South Oxford OX4 2RU Oxford OX4 2RU (GB)